html,body{
font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
color:#333;
font-size: 14px;
}
body,div,ul,li,p,h1,h2,h3,h4,h5,h6,header{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
ul,li{
    list-style:none;
}